Imagine Vision has released the smallest 4K m43 mount video camera ever, aimed at the drone market given its light weight and lack of LCD screen.
3840×2160 is supported at 30 fps and 4096×2160 at 24 fps (H264 codec).
This video camera can be remote controlled via a smartphone.
See Imagine Vision’s page about this video camera for more information. No price has been announced as of yet.